michael kehoe and captain joe rios arrived at sandy hook elementary within minutes of the call. >> we needed to break into the school to get in because the back doors are secured. >> reporter: how did you get it open? >> broke out the window. >> reporter: it was quiet, and the halls were empty. chief kehoe searched sandy hook elementary room by room. >> with the rooms locked, that means the teachers had done their job, locked their doors and hid their children from danger. so we went around the building to the front of the building. >> reporter: tell me about that. >> there was a very tragic observation on all parts because then you could see the carnage that was present. >> reporter: when you saw what was in that classroom, what went through your mind? >> i was devastated, absolutely devastated. i had no words. i felt a little bit of anger towards the person who had done this. >> reporter: did you think there was anyone there to save? >> no. >> reporter: as a first responder, how do you deal with that? >> well, you feel a sense of guilt that you weren't there quick enough to do that.